Restore Full Functionality to Your GM Vehicle
Are you battling bizarre electrical problems in your work van or truck? Intermittent wipers, flickering lights, a dead HVAC blower, or a security light that prevents your engine from starting are all classic signs of a failing Body Control Module (BCM). As the central command for your vehicle’s body electronics, a faulty BCM can make even the most reliable truck feel haunted. This replacement Body Control Module, part number 15198116, is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a true plug-and-play repair.
Forget about expensive dealership visits and programming fees. We handle the complex part for you. By programming the module with the latest GM software updates before it ships, we ensure it communicates flawlessly with your vehicle’s other systems right out of the box. This is the most efficient way to solve those frustrating electrical gremlins and get your 2004-2007 Express 2500 BCM functioning like new again.
From the Diagnostic Bay: The Case of the Haunted Express Van
I had a 2006 Express 2500 work van come into my shop that was driving the owner crazy. The complaint was a random no-start, but the battery and starter were fine. On top of that, the radio would sometimes stay on after the key was out, and the power locks worked only when they wanted to. After checking the main power and ground circuits, my scanner pointed to a loss of communication with the BCM. A visual inspection of the original module revealed minor corrosion on the pins—a common issue from moisture getting behind the dash. We swapped in a VIN-programmed BCM, and within minutes, every single issue was resolved. The van started reliably, and all accessories behaved perfectly. It’s a textbook example of how a single failing module can create a cascade of confusing symptoms.
Is Your Van Exhibiting These Electrical Gremlins?
- ✔️ Power windows, door locks, or interior lights operating erratically or not at all.
- ✔️ The security or anti-theft system light is on, causing a no-start condition.
- ✔️ HVAC blower motor is inoperative or stuck on one speed.
- ✔️ An airbag warning light is illuminated, often with a diagnostic trouble code like B1001 (Option Configuration Error).
- ✔️ Wipers won’t turn off or behave unpredictably.
- ✔️ Unexplained battery drain when the vehicle is off.
A Straightforward Guide to Installation
- ✔ Safety First: Begin by disconnecting the negative terminal from your vehicle’s battery to prevent electrical shorts and reset the system.
- ✔ Locate the BCM: On most 2004-2007 Express and Savana vans, you’ll find the BCM mounted in the center of the dash, often accessible from below. On trucks and SUVs, it’s typically located under the driver’s side dash, near the steering column.
- ✔ Disconnect and Remove: Carefully unplug the electrical connectors from the old module. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- ✔ Install the New Module: Seat the new, pre-programmed BCM into the mounting bracket and securely plug in all the electrical connectors. You’ll hear a click as they lock into place.
- ✔ Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all functions: lights, locks, windows, wipers, and the HVAC fan. Start the engine to ensure the security system has reset properly.
- ✔ Post-Installation Checks: In some cases, an airbag light may remain on. This requires a professional scan tool to perform the ‘Setup SDM Primary Key’ procedure. Similarly, a brake pedal position relearn might be needed. These are not always required but are simple procedures for any well-equipped shop.
Verified Vehicle Compatibility
This module is a direct replacement for part number 15198116 and interchanges with several others, including 15116066, 15136225, and 15194170. It is designed for a wide range of General Motors vehicles. While this is a perfect fit for the 2004-2007 Express 2500 BCM with the commercial tradesman package (opt PRP), please verify your specific model in the list below:
GMC: Sierra, Yukon, Savana Van (2002-2007)
Cadillac: Escalade, ESV, EXT (2003-2006)
Hummer: H2 (2003-2007)
Note: Specific fitment can depend on options like transmission type or cab configuration. Always match your part number or consult our fitment list.
Frequently Asked Questions
Frequently Asked Questions
Do I need to take my van to the dealer after installing this?
No. This Body Control Module is pre-programmed to your vehicle’s VIN before shipping. This eliminates the need for any additional dealership programming, saving you time and money.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old module without needing to send it back.
What tools do I need for installation?
Basic hand tools are all that’s required for the physical installation, typically a socket set or nut driver to remove the module. In some cases, a professional scan tool may be needed for post-installation procedures like an airbag system sync.
My airbag light came on after I installed the new BCM. Is it defective?
No, this is a normal security measure in GM vehicles. The new BCM needs to be electronically ‘introduced’ to the airbag’s Sensing and Diagnostic Module (SDM). This procedure, called ‘Setup SDM Primary Key in BCM’, must be performed with a compatible high-end scan tool to clear the light.
Will this fix my specific problem?
This module corrects issues directly controlled by the BCM, such as power accessories, security, and some lighting. While it’s a very common failure point, always perform a proper diagnosis to confirm the BCM is the root cause of your issue before ordering.